Mom's Spinach Salad

2 pkg fresh spinach
3 c. grated swiss cheese
2 tomatoes
1 head lettuce
1 lb sliced mushrooms
1 lb crumbled bacon
Sliced almonds

Dressing:
2/4 c. red vinegar
¾ c. sugar
1 ½ t. salt
1 ½ T. green onion
1 ½ T. poppy seed
¾ t. mustard
1 purple onion
1 ½ c. oil